Mounting for internal combustion engines



- H. KREMSER MOUNTING FOR INTERNAL COMBUSTION ENGINES Filed May 4. 1934 k M K 5 M.

Fig.3

Patented Get. 1935 ran Hans Kremser, Bergisch-Gladbach, Germany. assignor to Humboldt-Deutzmotoren, A. 6., Cologne-Deutz, Germany Application May 4, 1934, Serial No. 123,994 In Germany May 26, 1933 1 Claim.

The invention relates to a mounting for internal combustion engines in which several pistons in angularly displaced cylinders operate upon a common crank shaft, and more particularly 5 for engines having a star-shaped arrangement of cylinders.

With the exception of known arrangements of radial motors in flying apparatus, in which sufiicient space is provided also below the machine,

39 the lower cylinders of such motors are not accessible for the dismantling of a piston, the grinding of the valves, or the like. For example, this is the case when the radial engine with a horizontal crank shaft is built into-a conveyance such as a a5 railway car, automobile, or boat. In such cases, as a rule, the shaft must he as deep as possible, so that at times the lower cylinder extends below the bottom surface of the machine base. Difllculties arise particularly when the motor is supported freely by a fastening at only one end thereof, in which case, upon the loosening of the fastening means, the weight of the motor is not supported by the crank shaft. Heretofore, the motor had to be especially supported at its free as end before loosening the fastening flanges or else it had to be completely dismantled.

By the instant invention, the accessibility of all of the engine cylinders is rendered easy without the necessity for a dismantling of the engine.

80 The invention consists in the mounting of the engine in such a manner by means of a flange thereon that upon the loosening of one or more screws or bolts it may be rotated about a fastening flange therefor. In this manner one can bring 85 successively all of the working cylinders into the most desirable positions for the necessary work thereon.

Two embodiments of the invention are illustrated in the accompanying drawing wherein (all Fig. 1 shows a star-shaped motor with a marine drive in side elevation with certain parts in section,

Fig. 2 is a view similar to Fig. 1, through a multistage drive, adapted for example to an autoas mobile or to a railway car, and

Fig. 3 is a horizontal sectional view of the drive shown in Fig. 2. In Fig. 1, a four-cylinder star-shaped motor is freely extended from the housing 2 of the reg versing gear.

left end the cooling fan 3. The shaft is supported at its right end in ball bearings 5 which are disposed in the motor casing. Upon the outermost right end of the crank shaft is mounted a driving pinion 5 which engages with the gear The crank shaft 3 carries on its wheel I. The reversing drive is of the known type. The drive is executed either directly from gear wheel I to the cage 8 and the slip clutch 9 onto the tail shaft H), or over the bevel gear H,

intermediate gear wheels l2, and the bevel gear 5 l3 which is keyed onto the tail shaft M. For this purpose, in the former case, the clutch 9, controlled by reversing lever IA, is shifted into operation by means of the ring l5 and the roller levers IS; in the latter case the clutch is released and m the brake band I1 is pulled tight to hold the cage 8. The tail shaft I0 is fitted with water-tight connections in the stern tube l8 which is led through the boat wall. The tail shaft carries at its outermost end the screw propeller i9.

The engine housing has a flange which is disposed between the end wall of the drive housing and a ring'fll which is fastened thereon by means of screws or bolts 22. The housings are thus exactly centered with respect to each other. 20 When the fastening ring 2! is pulled tight, the flange 20 may still be rotated. In operation of the machine, relative rotation is prevented by means of a fitting in the form of a bolt 23, which is screwed into the ring 2| and furthermore engages in the flange 20 with a cylindrical end. In order to effect a rotation of the engine it is simply necessary to screw out the bolt 23.

Theengine is designed as a high speed machine. The reduction in speed by means of the gear wheels 6 and I is so chosen that the motor is elevated with respect to the reversing gear, and the lower boundary of the motor and the drive is at approximately the same elevation. The mounting of the motor in accordance with the invention is in this case especially advantageous because the motor housing cannot be supported by the crank shaft after the loosening of the mounting means.

The assembly of the motor and driving arrangement in Figs. 2 and 3 is shown with two longitudinal edges 24, .each supported upon a carrier 25. The line 26 designates a depression of the type into which extend the driving gear and the lower portion of the motor. This line corresponds to the lower boundary of the space. for the machine in an automobile or railway car. The elements in this arrangement corresponding to those shown in Fig. 1 are designated with the same reference characters. A fasten- 5o ing ring 2! is disposed upon a circular flange 2% on the engine casing, which ring is fastened onto the housing 21 of the multi-stage drive by means of screw bolts 22. The flange 20 is provided upon its opposite sides with a frictional covering which prevents a rotation of the engine in the course of operation thereof. The ring 2| is pressed tight against the flange the screws 22, a. slight clearance provided between the ring 2i 2! even when the screws position. when the motor is at rest and atuming of the casing thereofiis desired, it is merely necessary to loosen all of the screws 22 without completely removing them.

The crankshaft carries at its right end a 20 by means of preferably being and the housing 22 are in tightened clutch disk 25. The complementary disk 30 of Y the clutch is maintained in engagement with the disk 29 by means of a spiral spring 3|. The disk 29 may be shifted out of operation in the usual manner by means of a lever, which is not shown. Upon the shaft 32 are provided three loosely rotatable gear wheels of difierent sizes 33,

ll, 35, which alternatively may be rigidly coupled with the shaft 32 by means of clutches 36, 31,

and 38, respectively. Thereby one of the gear wheels 39, 40 and 4|, which are keyed upon the driven shaft 42, may be selectively actuated.

Having described my invention,

I claim:- I

In an apparatus of the class described, an internal combustion engine comprising a casing, radially disposed cylinders, and a crank shaft; a base for said engine at one end thereof; and fastening means between said engine and said base comprising a circular flange on said casing. a fastening ring for retaining said flange adjacent said base whereby said engine is supported for rotation about the axis of said crank shaft, and at least one bolt member detachably engaging said flange for preventing rotation of said flange and engine in the course of operation of the latter.

HANS KREMSER. 20 

